Depends on how quickly you're moving and how much polish you want :) Great for game jams and prototypes, not there yet for published games. Reasonably bug free

Depends on how quickly you're moving and how much polish you want :) Great for game jams and prototypes, not there yet for published games. Reasonably bug free, yes. Not too hard to upgrade, yes. Are critical features missing or inadequate (audio, animations, networking, UI...), also yes ;) But, just like making a game engine, there are a huge number of parts to making your game. If it's a weekend project, you can patch it up with 3rd party integrations and focus on the parts that are currently great.